This document introduces the features of Intersil X9525. X9525 is a digital controlled potentiometer and EEPROM memory for fiber optic modules
The X9525 combines two digitally controlled potentiometers (DCPs) and a 2‑kbit EEPROM with Block Lock™ protection. All functions are accessed via a standard 2‑Wire serial interface, making it suitable for bias and modulation control of laser diodes in GBIC‑compliant fiber‑optic modules.
The document provides pin assignments, serial bus conventions, internal addressing, write‑protect mechanisms, and detailed command sequences for volatile and non‑volatile operations of the DCPs and EEPROM. Package dimensions, supply voltage range, and RoHS compliance are also listed.
| Supply Voltage Range | 2.7 V to 5.5 V |
|---|---|
| Package Type | 20‑Pin TSSOP |
| EEPROM Size | 2 kbit |
The device operates from 2.7 V to 5.5 V.
The WP pin has an internal pull‑up; if left floating the write‑protect feature is enabled, otherwise pulling it low disables protection.